Dalian University of Technology , colloquially known in Chinese as Dagong , is a public research university located in Dalian and Panjin, Liaoning province, People's Republic of China. DUT, previously renowned as one of the Big Four Institutes of Technology, is among China's top universities for engineering and technology. It is also one of the national key universities administered directly under the Ministry of Education of China. Wikipedia.
Lu X.-B.,Dalian University of Technology |
Darensbourg D.J.,Texas A&M University
Chemical Society Reviews | Year: 2012
This comprehensive tutorial review focuses on well-defined cobalt complexes that serve as homogeneous catalysts for the production of polycarbonates and cyclic carbonates from the coupling of carbon dioxide and epoxides. Special considerations are given to the mechanistic pathways involved in these processes. © 2012 The Royal Society of Chemistry.
Sun H.,Dalian University of Technology
Nuclear Physics B | Year: 2014
In this work we study the constraints on the anomalous tqγ (q = u, c) couplings by photon-produced leading single top production and single top jet associated production through the main reactions pp→pγp→pt→pW(→ℓνℓ)b + X and pp→pγp→ptj→pW(→ℓνℓ)bj + X assuming a typical LHC multipurpose forward detectors in a model independent effective lagrangian approach. Our results show that: for the typical detector acceptance 0.0015 < ξ1 < 0.5, 0.1 < ξ2 < 0.5 and 0.0015 < ξ3 < 0.15 with a luminosity of 2fb -1, the lower bounds of κtqγ through leading single top channel (single top jet channel) are 0.0130 (0.0156), 0.0218 (0.0206) and 0.0133 (0.01655), respectively, corresponding to Br(t→qγ) ~ 3 × 10 -5. With a luminosity of 200fb -1, the lower bounds of κtqγ are 0.0041 (0.0048), 0.0069 (0.0064) and 0.0042 (0.0051), respectively, corresponding to Br(t→qγ) ~ 4 × 10 -6. We conclude that both channels can be used to detect such anomalous tqγ couplings and the detection sensitivity on κtqγ is obtained. © 2014 The Author.
Han F.-S.,CAS Changchun Institute of Applied Chemistry |
Han F.-S.,Dalian University of Technology
Chemical Society Reviews | Year: 2013
In the transition-metal-catalyzed cross-coupling reactions, the use of the first row transition metals as catalysts is much more appealing than the precious metals owing to the apparent advantages such as cheapness and earth abundance. Within the last two decades, particularly the last five years, explosive interests have been focused on the nickel-catalyzed Suzuki-Miyaura reactions. This has greatly advanced the chemistry of transition-metal-catalyzed cross-coupling reactions. Most notably, a broad range of aryl electrophiles such as phenols, aryl ethers, esters, carbonates, carbamates, sulfamates, phosphates, phosphoramides, phosphonium salts, and fluorides, as well as various alkyl electrophiles, which are conventionally challenging, by applying palladium catalysts can now be coupled efficiently with boron reagents in the presence of nickel catalysts. In this review, we would like to summarize the progress in this reaction. © 2013 The Royal Society of Chemistry.
Sun H.,Dalian University of Technology
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2014
In this paper, we investigate the γp photoproduction of jet plus missing energy signal to set limits on the couplings of the fermionic dark matter to the quarks at the LHC via the main reaction pp→pγp→ pχχj. We assume typical LHC multipurpose forward detectors and work in a model independent effective field theory framework. Typically, when we do the background analysis, we also include their corresponding single diffractive productions. Our result shows that by requiring a 5σ (S/B≥5) signal deviation, with an integrated luminosity of L=200fb-1, the lower bounds of the weakly interacting massive particle masses scale can be detected up to Λ equal to 665.5, 808.9, and 564.0 GeV for the forward detector acceptances ξ1, ξ2, and ξ3, respectively, where 0.0015<ξ1<0.5, 0.1<ξ2<0.5 and 0.0015<ξ3<0.15. © 2014 American Physical Society.
Sun J.,Dalian University of Technology
Bioresource technology | Year: 2012
In this study the feasibility of preparing bioflocculant from excess biological sludge was investigated. Hydrochloric acid was used to disintegrate sludge to prepare bioflocculant. The effects of acid dosage and flocculating conditions were studied. The optimized disintegration conditions was that acid dosage was 10 mL for 50 mL sludge suspension. Factors such as bioflocculant dosage, pH and temperature of the flocculant system were also tested. The optimal conditions were flocculant concentration 3.0% (v/v) and pH10.5 of flocculating suspension. Under these conditions, 99.5% of flocculating rate for 4 g/L kaolin clay was achieved. Ethanol and sodium hydroxide were applied to purify the crude sludge bioflocculant together or separately. Results showed that sodium hydroxide could separate the bioflocculant from aqueous solution more effectively than ethanol. Analysis of the purified bioflocculant by Fourier-transform infrared spectrophotometer (FT-IR) and chemical methods indicated that the main component was polysaccharide. Performance test showed that the sludge bioflocculant had moderate thermostability. Copyright © 2012 Elsevier Ltd. All rights reserved.